Fig. 8. Transcriptional control elements in the bam promoter. The 5'-UTR and proximal upstream sequences are shown with various landmarks indicated. The 5'-end of the smallest promoter with full rescuing activity tested in the studies is indicated as `–198'. Regions containing transcriptional control elements are presented in large, upper case fonts and distinguishing colored backgrounds. The region that contains germ cell (GC)-specific enhancer element(s) (–86 to –61) is highlighted in blue. The GC-rich sequence that is essential for bam transcription and matches the consensus binding site for Mad protein is underlined. The sequences outlined in gray could be replaced by basal promoter elements from the P-element promoter, whereas the transcriptional start site (+1) is highlighted with green. The bipartite silencer element in the bam 5'-UTR is outlined in two colors, with A in purple and B in yellow. The initiating methionine codon is in red.